Filter-valve.



No. 897,606. PATENTED SEPT. 1, 1908. J R. 61: G. P. ELFRETH.

FILTER VALVE.

APPLICATION FILED MAB. 6, 190B.

2 BKEETSSEEET 1.

Wu mom Th; nuRRls PETERS co, WASHINGTON, 04 c.

No. 897,606. P-ATENTED SEPT. 1, 1908, J. R. & c. P. ELFRETH.

FILTER VALVE.

APPLICATION FILED MAR. 5, 1908.

2 SHEBTBSHEET 2.

UNITED STATES PATENT oEEIoE.

JACOB R. ELFRE'IH AND CALEB P. ELFRETH, OF PHILADELPHIA, PENNSYLVANIA.

FILTE R-VALVE Specification of Letters Patent.

Patented Sept. 1, 1908.

Application filed March 5, 1908. Serial No. 419,381.

To all whom it may concern:

Be it known that we, JAooB R. ELFRETH and CALEB P. ELFRETH, both citizens of the United States, residing in the city and county of Philadelphia, State of Penns lvania, have invented a new and useful Fi ter-Valve, of which the following is a specification.

Our invention relates to a new and useful filter and consists of a sand valve therefor which is provided with a solid upper plate.

It further consists in providing attaching means for the upper plate which permits of a certain upward movement of said plate.

It further consists of a new and useful body or support for the plate wherein we provide a dlsh-shaped inner construction for permitting free flow of the water in its passage through the valve.

It further consists of other novel features of construction, all as will be hereinafter fully set forth. 7

Figure 1 represents a plan view of a valve showing the solid plate. Fig. 2 represents a sectional view on line xa:, Fig. 1. Fig. 3 represents a top plan view of a sand valve embodying our invention with a portion of the top plate broken away and showing the body portion as used with a plate havin slots therein. Fig. 4 represents a sectiona view of the valve showing the solid plate in use with a different form of body.

lVe have found in practice that in sand valves now employed in filters, in some instances, the wings, fla s or valves are apt to be broken away or t e top plate bent by reason of the opening and closing of the ports in' operation by the pressure of the water in its passage through the valve and we have further found that in some instances the water in its passage through the valve is retarded by reason of the construction of the body portion or support for the plate having the side walls which form an abutment against which the water strikes, causing back pressure.

Our present invention is designed to overcome these defects and while we have shown in the drawings a form for carrying out the same it will be evident that other instrumentalities may be employed which will accomplish the same result and we do not desire, therefore, to be limited in every instance to the exact construction as herein shown and described but wish to make such changes as may be necessary.

Similar numerals of reference indicate correslponding parts in the figures.

eferring to the drawings: 1 designates a sand valve consisting of a body portion or bottom 2 and the top plate 3. The plate 3, as shown in Figs. 1, 2 and 4, is formed solid or integral, that is without any slots or perforations other than those for the reception of the fastening means. The body portion 2, as shown in Figs. 2 and 3, is formed with the bosses 7 having the openings 8 therein, said bosses being slightly higher than the up per wall 9 of the body so that when the plate 3 is in position there would be formed between the said edge 9 and the plate 3, the port or opening 10 around the valve. The openings 8 are adapted to receive the fastening means, which in the present instance consists of the screws 11 having a ortion of their shanks smooth as at 12 and aving the head 13, said threaded portions 11 being adapted to engage with threads in the openings 8 and the smooth portion or circumference 12 of this screw being seated in the openings 14 of the plate 3 and permitting movement of said plate, it being understood that when the water is being filtered, that is passing downwardly through the valve, the said plate 3 will be held normally in the position seen in Fig. 2, the weight of the sand superimposed thereon assisting in this action. When, however, it is desired to cleanse the filter and sand and the direction of the water is reversed, the force of the water will raise or elevate the plate 3 so that a greater volunie or quantity of water can pass through the port 10 which would not be advisable in filtering, since dirt and sand would pass through the port 10 if it were of too great an extent, the upward movement of the plate 3 being prevented by reason of the head 13 of the screws. The inner wall of the body 2 is inclined or dish-shaped as at 15 in all directions from the center opening 16, which is threaded in order to receive a suitable pipe, as will be evident, the said opening 16 extending through a boss 17 integral with or connected with the body 2. By this means it will be seen that as the water passes through the port as when filtering, it can be directed at once to the discharge pipe, connected-with the opening at 16 and when the direction of the water is reversed for cleansing it can pass directly to the port 10 without meeting any obstruction or abutment, which might cause a counter current or prevent the free passage of the water through thevalve. In order to support the plate 8, We provide the studs or pins 18 as will be evident. In the construction seen in Fig. 3, we have shown the top plate 4 as provided with the slots 5, forming the wings, flaps or valves 6 therebetween, the dish-shaped body as shown in use with the plate having the slots 5 and wings, flaps or valves 6, while in Fig. 4 we have shown the solid plate 8 in use in conjunction with a different form of body which may be used if desired with the solid plate 3 and in which construction the lower portion or body 19 is provided with the side walls 20 to which the plate 3 is attached in any desired and efficient manner, the pins or supports 18 being ada ted to perform the same function as those siown in Fig. 2 as before described and the means for attachment to the discharge pipe being shown as a coupling 21.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is

1. In a sand filter valve, a body, a movable solid plate thereon, means for providing a port between the body and plate at all times and a stop for said plate to limit the movement thereof.

2. In a sand filter valve, a body, the inner walls of which are inclined or dish-sha ed, a top plate movably connected with saic body and forming a port therebetween at all times, apd means for limiting the movement of said p ate.

3. In a sand filter valve, a body having an inclined inner face, bosses formed on said body, pins or extensions on said body and a plate movably attached to said body supported by said bosses and said pins.

- 4. In a sand filter valve, a body, a solid top plate forming a valve ort between said body and said plate at all times, the latter being movable as a valve and a stop for limiting the upward movement of said plate.

5. In a sand filter valve, a body having an inclined inner wall, bosses on said body, 1pins or projections on said body, a solid top p ate, normally supported by said bosses and means for connecting said plate with said body and for permitting a certain upward movement thereof.

JACOB R. ELFRETH. CALEB P. ELFRETH. Witnesses:

O. D. McVAY,

J. O. MoGLAsHEN. 

